Summary Of Significant Accounting Policies (Narrative) (Details) $ in Thousands, $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2021 AUD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2021 NZD ($)	Sep. 30, 2021 AUD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2021 NZD ($)
Summary Of Significant Accounting Policies [Line Items]
Amount Of Government Grants And Assistance Receivable		$ 0			$ 0
Australia [Member]
Summary Of Significant Accounting Policies [Line Items]
Subsidies received		2,300,000		$ 3.5	2,300,000
New Zealand [Member]
Summary Of Significant Accounting Policies [Line Items]
Subsidies received		$ 200,000	$ 288		$ 200,000	$ 288